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output.h

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+/*
+ * Copyright 2008-2013 Various Authors
+ * Copyright 2005 Timo Hirvonen
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CMUS_OUTPUT_H
+#define CMUS_OUTPUT_H
+
+#include "sf.h"
+#include "channelmap.h"
+
+extern int volume_max;
+extern int volume_l;
+extern int volume_r;
+
+void op_load_plugins(void);
+void op_exit_plugins(void);
+
+/*
+ * select output plugin and open its mixer
+ *
+ * errors: OP_ERROR_{ERRNO, NO_PLUGIN}
+ */
+int op_select(const char *name);
+int op_select_any(void);
+
+/*
+ * open selected plugin
+ *
+ * errors: OP_ERROR_{}
+ */
+int op_open(sample_format_t sf, const channel_position_t *channel_map);
+
+/*
+ * drop pcm data
+ *
+ * errors: OP_ERROR_{ERRNO}
+ */
+int op_drop(void);
+
+/*
+ * close plugin
+ *
+ * errors: OP_ERROR_{}
+ */
+int op_close(void);
+
+/*
+ * returns bytes written or error
+ *
+ * errors: OP_ERROR_{ERRNO}
+ */
+int op_write(const char *buffer, int count);
+
+/*
+ * errors: OP_ERROR_{}
+ */
+int op_pause(void);
+int op_unpause(void);
+
+/*
+ * returns space in output buffer in bytes or -1 if busy
+ */
+int op_buffer_space(void);
+
+/*
+ * errors: OP_ERROR_{}
+ */
+int op_reset(void);
+
+void mixer_open(void);
+void mixer_close(void);
+int mixer_set_volume(int left, int right);
+int mixer_read_volume(void);
+int mixer_get_fds(int what, int *fds);
+
+void op_add_options(void);
+char *op_get_error_msg(int rc, const char *arg);
+void op_dump_plugins(void);
+const char *op_get_current(void);
+
+#endif